CVE-2026-90463

A flaw was found in the sssd NSS responder. This input validation vulnerability allows a local attacker, by sending specially crafted service lookup requests to the NSS responder's UNIX socket, to cause an out-of-bounds read. This out-of-bounds read may lead to a denial of service (DoS) by crashing the NSS responder process. While unprivileged local clients can typically reach the socket, there is no evidence of privilege escalation or reliable data disclosure.

This vulnerability has a Low impact as it is a local-only parser bug in the SSSD NSS responder. Exploitation requires a local process to connect to the NSS responder UNIX socket, which can lead to an out-of-bounds read and potentially a denial of service. There is no evidence of privilege escalation or reliable data disclosure.

The CVSS score(s) listed for this vulnerability do not reflect the associated product's status, and are included for informational purposes to better understand the severity of this vulnerability.

There's no appropriated mitigation for this issue.